Hiking in derry rail trail: trails, map and practical info

{
"opening_paragraph": "The Derry Rail Trail runs along a converted railroad corridor through the Merrimack Valley, offering one of the most accessible outdoor experiences in southern New Hampshire. Built on a former rail bed, the trail spans approximately 4-6 kilometers with only 10-27 meters of elevation gain across its entire length — essentially flat from start to finish. That combination of modest distance and gentle grade makes it genuinely welcoming for hikers of all ages and fitness levels, from young families with strollers to older adults looking for a comfortable walk without the challenge of steep terrain.",
"surface_and_terrain": "The surface is a well-maintained paved path — firm, durable, and excellent for walking, biking, and running. The old railroad grade does all the work here: because the original rail line was engineered for minimal slope, the trail stays consistently level without the rollercoaster profile you'd find on most natural footpaths. The trail connects to the Windham Rail Trail at its southern end and reaches Derry's town center to the north, with future plans to connect to the Londonderry Rail Trail (anticipated 2026/2027).",
"duration_note": "At 4-6 kilometers, plan for roughly 1-1.5 hours if you're covering the distance at a relaxed pace. Bring enough water for a comfortable walk, especially in summer when the open sections offer limited shade. Regular walking shoes with decent grip handle the paved surface without any trouble; specialized hiking boots aren't necessary."
}